gregincal
Active Member
As I understand it, instead of heating the battery directly, they are going to heat up the motor first, and then use heat from the motor to warm the battery. So it will be slower to warm up the battery and be less efficient.
So lower cost but also worse performance.
That's not really the right way of looking at it. The motor is acting as a resistive heater in exactly the same way as a dedicated resistive heater. In both cases they heat fluid that runs through the battery to heat the cells. The dedicated resistive heater doesn't heat the battery any more directly than this method, and the only way it would be slower is if the motor is able to use less power to do resistive heating, which we don't know.